func main() {
// core.go: defined using go
for k, v := range core.NS {
repl_env.Set(Symbol{k}, Func{v.(func([]PlumType) (PlumType, error)), nil})
}
repl_env.Set(Symbol{"eval"}, Func{func(a []PlumType) (PlumType, error) {
return EVAL(a[0], repl_env)
}, nil})
repl_env.Set(Symbol{"*ARGV*"}, List{})
// core.Plum: defined using the language itself
repl("(define not (fn* (a) (if a false true)))")
repl("(define load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \")\")))))")
repl("(defmacro cond (fn* (& xs) (if (> (count xs) 0) (list 'if (first xs) (if (> (count xs) 1) (nth xs 1) (throw \"odd number of forms to cond\")) (cons 'cond (rest (rest xs)))))))")
repl("(defmacro or (fn* (& xs) (if (empty? xs) nil (if (= 1 (count xs)) (first xs) `(let* (or_FIXME ~(first xs)) (if or_FIXME or_FIXME (or ~@(rest xs))))))))")
repl("(define not1 (fn* (a) (if a false true)))")
repl(`(load-file "lib/base.p")`)
// called with Plum script to load and eval
if len(os.Args) > 1 {
args := make([]PlumType, 0, len(os.Args)-2)
for _, a := range os.Args[2:] {
args = append(args, a)
}
repl_env.Set(Symbol{"*ARGV*"}, List{args, nil})
if _, e := repl("(load-file \"" + os.Args[1] + "\")"); e != nil {
fmt.Printf("Error: %v\n", e)
os.Exit(1)
}
os.Exit(0)
}
// repl loop
for {
text, err := readline.Readline("user> ")
text = strings.TrimRight(text, "\n")
// fmt.Println(text)
if err != nil {
return
}
var out PlumType
var e error
if out, e = repl(text); e != nil {
if e.Error() == "<empty line>" {
continue
}
fmt.Printf("Error: %v\n", e)
continue
}
fmt.Printf("%v\n", out)
}
}
}
},
"keyword?": func(a []PlumType) (PlumType, error) {
return Keyword_Q(a[0]), nil
},
"pr-str": func(a []PlumType) (PlumType, error) { return pr_str(a) },
"str": func(a []PlumType) (PlumType, error) { return str(a) },
"prn": func(a []PlumType) (PlumType, error) { return prn(a) },
"println": func(a []PlumType) (PlumType, error) { return println(a) },
"read-string": func(a []PlumType) (PlumType, error) {
return reader.Read_str(a[0].(string))
},
"slurp": slurp,
"readline": func(a []PlumType) (PlumType, error) {
return readline.Readline(a[0].(string))
},
"<": func(a []PlumType) (PlumType, error) {
return a[0].(int) < a[1].(int), nil
},
"<=": func(a []PlumType) (PlumType, error) {
return a[0].(int) <= a[1].(int), nil
},
">": func(a []PlumType) (PlumType, error) {
return a[0].(int) > a[1].(int), nil
},
">=": func(a []PlumType) (PlumType, error) {
return a[0].(int) >= a[1].(int), nil
},
"+": func(a []PlumType) (PlumType, error) {